check email is real or not?

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how can i check email address is real or not?
real not valid!
please help me.

Posted 30-Apr-14 5:32am

saeed rajabi

Updated 30-Apr-14 5:35am

v2

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phil.o · Answer 1 · 2014-04-30T08:16:00

Solution 2

In short, you cannot. As stated in this post[^], a mechanism had been implemented in SMTP protocol for testing the existence of a specific mailbox, but the most use it has ever found was with malicious requests, not legitimate ones. So about every mail system is actually configured to lie when such a request comes in.

You still have the option to effectively send an email to said mailbox; if the server responds to you with a 5.5.0 Mailbox unavailable code, then you know the mailbox does not exist.

Posted 30-Apr-14 8:16am

phil.o

Comments

Sergey Alexandrovich Kryukov 30-Apr-14 14:39pm

5ed, but you should have better posted this one: http://stackoverflow.com/questions/565504/how-to-check-if-an-email-address-exists-without-sending-an-email/566121#566121.
—SA

phil.o 30-Apr-14 14:50pm

Yes, interesting too. I did not see a mail server accepting to sincerely respond to a VRFY command for many years now. And most of the time a RCPT command will not say anything, because usually antispam systems handle that silently.

Sergey Alexandrovich Kryukov 30-Apr-14 14:59pm

Corporate mail usually support delivery confirmation, inside the company...
—SA

phil.o 30-Apr-14 15:05pm

Yes, inside the company; I'm not sure OP's need is to fetch this information from inside ;)

Sergey Alexandrovich Kryukov 30-Apr-14 16:06pm

:-)
Anyway, all this question is just beating the dead horse. I think we answered to it. OP is advised to accept both answers and go in for something more useful. :-)
—SA

Sergey Alexandrovich Kryukov · Answer 2 · 2014-04-30T05:39:00

Generally, you cannot. This is not how mail works.

You can formally request for the delivery confirmation of your e-mail, but this is nothing but automation of the reply by a mail recipient, which is triggered when a use "opens" your message; and then you receive the notification by regular mail at your return address. Not all mail delivery agents will support it; and sometimes the recipient user can disable this feature even if it is supported (this is called "opt-out"). Please see:
http://en.wikipedia.org/wiki/Email_tracking[^].

—SA